Correlation energy and its temperature dependence

被引：5
|
作者：
Hong, S
Mahan, GD
机构：
[1] UNIV TENNESSEE,DEPT PHYS & ASTRON,KNOXVILLE,TN 37996
[2] OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831
来源：
PHYSICAL REVIEW B | 1996年 / 53卷 / 03期
关键词：
D O I：
10.1103/PhysRevB.53.1215
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The correlation energy due to the ring diagrams of an electron gas is evaluated analytically at low temperatures. We emphasize an important correction term that was neglected in the previous calculation. This correction comes from the difference between the frequency summation and the corresponding integral of the zero-temperature limit. The correction contains a t(2) ln t term, which cancels out the t(2) lnt term in the exchange energy, and a large contribution to the t(2) term. The coefficient of t(2) in the exchange-correlation energy is thus obtained exactly in the standard random-phase approximation.
引用
收藏
页码：1215 / 1224
页数：10
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